<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>jqdom</title>
</head>
<body>
  <div class="dom1">
    <div class="child1">child1</div>
    <div class="child2">child2</div>
    <div class="child3">child3</div>
  </div>
</body>
<script src="jqdom.js"></script>
<script src="main.js"></script>
</html>